diff --git a/vhost/src/vhost_user/dummy_backend.rs b/vhost/src/vhost_user/dummy_backend.rs
index a45d3b4..e2a4682 100644
--- a/vhost/src/vhost_user/dummy_backend.rs
+++ b/vhost/src/vhost_user/dummy_backend.rs
@@ -345,6 +345,6 @@ impl VhostUserBackendReqHandlerMut for DummyBackendReqHandler {
         Ok(())
     }
     fn set_log_base(&mut self, _log: &VhostUserLog, _file: File) -> Result<()> {
-        Err(Error::InvalidMessage)
+        Ok(())
     }
 }
diff --git a/vhost/src/vhost_user/mod.rs b/vhost/src/vhost_user/mod.rs
index f8d3384..1ecdc25 100644
--- a/vhost/src/vhost_user/mod.rs
+++ b/vhost/src/vhost_user/mod.rs
@@ -427,7 +427,7 @@ mod tests {
             backend.handle_request().unwrap();
 
             // set_log_base,set_log_fd()
-            backend.handle_request().unwrap_err();
+            backend.handle_request().unwrap();
             backend.handle_request().unwrap_err();
 
             // set_vring_xxx